What am I actually inhaling?

The vapor that is inhaled by the user is primarily vaporized nicotine, propylene glycol (USP Grade), Glycerine (USP Grade) and Natural and/or Artificial flavoring. The nicotine level and flavor differs based on the users choice. Unlike traditional tobacco cigarettes which have over 4000 chemical additives, e-Cigarettes only include the additive Propylene glycol and/or Glycerine, a non-toxic, oil based humectant which is typically found in food coloring and cake mixes. It is considered to be generally safe for consumption by the Food and Drug Administration (FDA).